Equation balance
Balance Lab
Apply legal operations to both sides of an equation until the unknown is isolated.
8 missions · Developing · Untimed
Algebra
Equations, functions, graphs and factorization.
5 activities · 32 guided missions · No account needed
Browse interactive library →Start learning →
Rule discovery
Function Machine
Wire an ordered pair of operations to reproduce a mysterious input-output rule.
6 missions · Developing · Untimed
Linear graph studio
Graph Glider
Tune slope and intercept until your line passes through the marked beacons.
6 missions · Developing · Untimed
Algebra tiles
Quadratic Garden
Build a rectangular area model that factors a quadratic into two binomials.
6 missions · Stretch · Untimed
Applied reasoning
Rule Finder
Six applied problems with plausible alternatives and worked explanations.
6 missions · Stretch · Untimed
Practice, with a little more purpose.
Work without a countdown. Try the model, use a hint, then read the explanation. Checkpoints and practice records stay on your device. Teaching tools create shareable activity playlists and printable worksheets with answer keys.
These are original practice activities, not an accredited course or a secure assessment. Difficulty labels are editorial, not formal grade alignment. Science activities use explicitly simplified models. Playing requires JavaScript; this directory does not. See each activity's reference and model limits.